Amazing !
If the batteries have leaked, just buy a repro board, or a NOS board. The game was not designed to sit in a box for almost 20 years !
I'm waiting for the Ex Bally employee's relative to sell the basement full of NIB 70's SS Ballys. I'm told there's between 6 - 10 games that have never been opened - KISS, Mata Hari, Paragon ..